In this study, experimental and numerical investigations were carried out in order to determine the mechanical properties and impact response of hybrid composite laminate. The hybrid composite laminate was formed from plain woven carbon fiber reinforced epoxy (CFRE) and plain woven glass fiber reinforced epoxy (GFRE) fiber using VARTM (vacuum-assisted resin transfer molding) process. The mechanical properties of the hybrid composites were determined using tensile test device with a 1 mm/min loading rate at room temperature. In addition, hybrid composites were subjected to low-velocity impact test under different impact energy levels (10, 20, 30, 40 J) for determining the impact response. Moreover, mechanical properties and impact responses of CFRE and GFRE laminates were also determined to compare to those of hybrid composite (HCGFRE). Microstructure analysis was performed to investigate the damage surfaces of the fiber and matrix in the composite material subjected to impact and tensile forces. In numerical analyses, composite damage model (Mat 54) was utilized in LS-DYNA® explicit finite element program to simulate the impact behavior of CFRE, GFRE and HCGFRE laminates. Consequently, the tensile test results showed that hybrid composite laminate behaved more ductile than carbon composite laminate and it exhibited more brittle behavior than glass composite laminate. Also, it was determined that absorbed energy and impact load capacity of HCGFRE composite laminate are between absorbed energy and impact load capacity of CFRE and GFRE composite laminate. It was determined that numerical results indicate a similar tendency with the experimental results.

中文翻译：

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混合复合层压板低速冲击响应的实验与数值测定

在这项研究中，进行了实验和数值研究，以确定混合复合层压板的机械性能和冲击响应。混合复合层压板由平纹编织碳纤维增强环氧树脂 (CFRE) 和平纹编织玻璃纤维增​​强环氧树脂 (GFRE) 纤维使用 VARTM（真空辅助树脂传递成型）工艺制成。在室温下使用拉伸试验装置以 1 mm/min 的加载速率测定混合复合材料的机械性能。此外，混合复合材料在不同冲击能量水平（10、20、30、40 J）下进行低速冲击试验，以确定冲击响应。此外，还确定了 CFRE 和 GFRE 层压板的机械性能和冲击响应，以与混合复合材料 (HCGFRE) 进行比较。进行微观结构分析以研究复合材料中纤维和基体在受到冲击和拉力作用下的损伤表面。在数值分析中，LS-DYNA® 显式有限元程序利用复合材料损伤模型（Mat 54）来模拟 CFRE、GFRE 和 HCGFRE 层压板的冲击行为。因此，拉伸试验结果表明，混合复合层压板比碳复合层压板更具延展性，并且比玻璃复合层压板表现出更脆的行为。此外，还确定了 HCGFRE 复合层压板的吸收能量和冲击载荷能力介于 CFRE 和 GFRE 复合层压板的吸收能量和冲击载荷能力之间。确定数值结果表明与实验结果相似的趋势。